XLS export error on one CB view

apexbit created the topic: XLS export error on one CB view

I have installed breezingforms pro and CB on latest joomla and using php 7.1
On my site there are 3 CB views and only on one of them the XLS export button is saving a 1 kb file that give this error: "Excel cannot open the file... because is either not valid or the extension is not valid..." The other two CB views are working fine and these are installed on the same db.
Need help... Thank you

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